astronomy

Leif Bjørnø

Leif Bjørnø is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Leif Bjørnø rather than just read about it. In short: Leif Bjørnø (30 March 1937 – 24 October 2015) was born on 30 March 1937 in Svendborg, Denmark. Son of Svend Aage Valdemar and Elna Marie Jensen.

Key takeaways

Leif Bjørnø belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Leif Bjørnø to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Leif Bjørnø from memory before moving on to harder problems.

Reference excerpt

Leif Bjørnø (30 March 1937 – 24 October 2015) was born on 30 March 1937 in Svendborg, Denmark. Son of Svend Aage Valdemar and Elna Marie Jensen. Leif Bjørnø, professor and well known acoustician. Named Knight of the Order of Dannebrog, Her Majesty the Queen of Denmark 1991, recipient Gold medal Society Francaise d'Acoustique, 1995, Lord Rayleigh's Gold medal, London, 1997, The Hartmann Prize, Copenhagen, 1999, Fellow of the Acoustical Society of America, a Life Fellow of the Institute of Electrical and Electronics Engineers.

Education Leif Bjørnø was student at University Roskilde (Denmark), 1956. Received degree of Master of Science in Mechanical Engineering, Technical University Denmark, Lyngby, 1962, Doctor of Philosophy, Technical University Denmark, Lyngby, 1967. Diploma, Imperial College, London, 1971. Doctor of Philosophy (honorary), University Crete, 1996. Professor (honorary), Harbin University Engineering, 1994.

Engineering and scientific career Leif Bjørnø had the following positions: assistant professor Technical University Denmark Lyngby, 1967–1969, associate professor, 1970–1978, professor industrial acoustics, since 1978. Retired, 2000. Managing director UltraTech Holding 2000–2012. Visiting professor Imperial College, London, 1969–1970. Chairman mechanical engineering, vice president Academy Technology Sciences, 1989–1993. Chairman board directors Brunata Aktieselskab, Syd-Tek, Food Tech. Member of Board directors Reson Aktieselskab, Reson Inc., Denmark and United States of America, president 2d European Congress Underwater Acoustics, 1994. Leif Bjørnø served as chairman or member of the scientific committee for the 2010, 2012, and 2013 Sea Side Security (SSS) Conferences. Leif Bjørnø was the joint conference as chairman – together with Professor John S. Papadakis – for the 2005–2012 International Conferences on Underwater Acoustic measurements held in Greece. He was also the organizer and joint conference chairman with Professor Papadakis of the 2012, 2013, and 2015 International Conference and Exhibition on Underwater Acoustics (UA).

Membership Leif Bjørnø has been a visiting professor in university departments in Chile, China, Greece, South Africa, United Kingdom, and the United States. He was the chairman mechanical engineering, vice president Academy Technology Sciences, 1989–1993. Chairman board directors Brunata Aktieselskab, Syd-Tek, Food Tech Aktieselskab. Board directors Reson Aktieselskab, Reson Inc. United States of America, president 2d European Congress Underwater Acoustics, 1994.

Publications Applied Underwater Acoustics, ISBN 978-0128112403 Fluid Mechanics, 1972. Author or co-author 8 books, 2 translation. Editor Ultrasonics, 1973–1994. Contributor 350 articles to international journals, conference proceedings and books.

Awards 1991 he was named a Knight of the Order of Dannebrog by Her Majesty, Margrethe II, Queen of Denmark 1995 the French Acoustical Society Gold Medal 1995 the first recipient of the International Congress on Ultrasonics Gold Whistle award 1997 the Lord Rayleigh Medal by the UK Institute of Acoustics. 1999 the Danish Hartmann Prize, in Copenhagen for his outstanding contributions to the Danish community and his profession 2005 the Medal of Merit and Johannes Hevelius Medal by the Gdansk University of Technology 2006 Ignacy Malecki Medal by the Polish Acoustical Society. Leif was professor honoris causa at the University of Harbin, China, and he was a Doctor of Philosophy honoris causa at the University of Crete, Greece.

References

External links Obituary In Memory of Leif Bjørnø, The IEEE Oceanic Engineering Society Obituary Leif Bjørnø, Acoustics Today

Illustrations

Worked examples

Example 1 — a first encounter with Leif Bjørnø

Start with the simplest possible case. Write down what Leif Bjørnø claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Leif Bjørnø before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Leif Bjørnø ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Leif Bjørnø

In research: Leif Bjørnø appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Leif Bjørnø in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Leif Bjørnø is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1937 births, 2015 deaths, Academic staff of the Technical University of Denmark, so understanding it makes those chapters shorter.
In everyday life: Look for Leif Bjørnø outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Leif Bjørnø in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Leif Bjørnø means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Leif Bjørnø out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Leif Bjørnø in simple terms?

Leif Bjørnø (30 March 1937 – 24 October 2015) was born on 30 March 1937 in Svendborg, Denmark. Son of Svend Aage Valdemar and Elna Marie Jensen.

Why does Leif Bjørnø matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Leif Bjørnø?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Leif Bjørnø.